Scope and Contents note From the Sub-Series: Records of the Chief Mechanical Officer (CMO) dating mainly from the 1950s and 1960s, and of the Mechanical Superintendent, dating primarily from 1945-1949. The CMO’s files, which also contain some Mechanical Superintendent’s records, concern car equipment, car assignments, 1950-1968, car storage in U.S. government facilities, the National Railways of Mexico deluxe train between Mexico City and Laredo, 1942-1954, shop personnel matters, shop operations, and the takeover of service by the...